Mr. Chain Heavy-Duty Stanchions with Reflective Stripes add visibility and are an effective and cost-effective solution for the toughest crowd control applications. Each stanchion post stands 41 inches tall with a 16-inch hollow base that can be filled with sand for added stability. Two c-hooks on the top of each stanchion allow you easily attach plastic chain (not included) and run it in a continuous length. Great for military bases, government buildings, manufacturing plants, and other settings that require heavy-duty crowd control, these stanchion posts excel at creating awareness of potential hazards, controlling traffic, and restricting access. The lightweight, high-density polyethylene design is made with UV inhibitors for long-lasting outdoor use.